Generator for refrigerating apparatus.



UNITED STATES Patented December 29', 1903.

PATENT OFFICE.

GENERATOR FOR REFRIGERATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 747,943, dated December29, 1903- Applioation filed December 27, 1901. Serial No. 87,466. (Nomodel.)

T aZZ whom it may concern.-

Be it known that I, NATHAN W. CONDICT, a citizen of the United States,residing in Jersey City, in the county of Hudson, State of New Jersey,have invented Improved Generators for Refrigerating Apparatus, of whichthe following is a specification.

In the operation of refrigerating apparatus working on the ammonia orother absorption system the most troublesome part of the apparatus isthe generator or still in which the gas is generated from theammoni'acal liquor.

' The trouble is due in large part to the changtical or horizontal styleof still is that in the .Iso

working of the apparatus the level of the liquor will drop below theupper steam-coils or upper parts'of the coils. Such changing conditionsof the quantity of liquor in relation to the heating surface produceirregular action in the working of the complete plant and varying anduncertain results at the point where the refrigeration is needed.

The principal feature of my present invention is the construction of thestill or genera tor so that a practically constant quantity ofammoniacal liquor will be maintained in such generator or still at alltimes to cover the wholeof the heating-surface, and so maintain uniformaction of the refrigerating plant at all times.

In the accompanying drawings, Figure 1 is a vertical section of a formof still embodying my invention. Fig. '2 is an external view of the sameat right angles to Fig. 1. Fig. 3 is 'a vertical sectional view of amodification.

number of annular heating-coils E to permit exhaust-steam to be used asthe heating medium. I prefer to take the steam in at the upper end, asby means of a pipe G, having branches 6 e,provided with valves H andpassing through the head a of the cylinder in any usual way to theseveral coils E. Similarly, the coils have outlet ends 6 e at thebottom, passing through the lower head a, of the cylinder and leading tothe discharge-pipe G, valves H being provided in the pipes e be tweenthe head and the pipe G.

I provide in the still an overflow for the weak-liquor outlet. Thisoverflow I prefer to make in the form of a cylinder D, arranged in thecenter of the still within the annular coils E and secured at its lowerend to the I inner face of the head a with a tight joint, but open atits top. 'lheopen top of this overflow D is a little higher than thetopmost steam-pipes in the still. The outletpipe J for the weak liquorleads from within this overflow D at the bottom, while the strong liquoris fed into the heating-space,

between the walls of the still and this overflow, as by means of a pipeI. Thus the weak liquor can be drawn off. from the still 7 mainconstant. If desired, an additional heating-coil F may be arrangedwithin the overflow D, the top of the latter being provided with aninternal flange d to direct the overflowing liquor onto the .coils F, sothat the latter may drive off any gas remaining in the overflowingliquor. It will be understood that the heating-coils EandF areimperforate and do not admit steam into the contents of the still. Thegas passes ofi from the top of the still through a pipe L. A gage N maybe pr0- vided, communicating at the bottom with the bottom of theoverflow D and at the top with the upper part of the still, to show thelevel of weak liquor within the overflow.

Instead of bringing in the strong liquor into the heating-space throughthe. bottom header, as indicated in Fig. 1, I prefer to bring it in inthe way which I have for the sake of simplicity shown separately in Fig.3. As there shown, the strong-liquor supplypipe 1' comes in at the topof the still and has lateral branches 2" c" discharging onto an uppertray T. This tray has a marginal flange t and central flanged outlet25', whence the liquor drips onto a larger flanged tray T, also with amarginal flange and an outlet pipe or pipes s discharging near thebottom of the heating-space of the still. By the use of a heater orheat-exchanger the incoming strong liquor can be considerably heated bythe time it reaches the still, so that as it passes over the trays inthe gasspace in the still generation may begin at once.

I claim as my invention 1. A still for an absorption refrigeratingapparatus, the said still having an overflow for the weak liquor, astrong-liquor inlet near the bottom of said still on one side of theoverflow, imperforate heating-coils on the same side of the overflow,and a weak-liquor outlet near the bottom of the still on the other sideof the overflow and a gas-outlet at the top, as and for the purposedescribed.

2. A still for an absorption refrigerating apparatus, said still havinga gas-outlet at the top, a central overflow-pipe, at the bottom of whichis the weak-liquor outlet, and imperforate heating-coils about thecentral overflow-pipe, the strong-liquor inlet being ifln theheating-space about the central over- 3. A still for an absorptionrefrigerating apparatus, said still having imperforate heating-coils,with an overflow-pipe atthe weakliquor outlet and a supplementaryheatingcoil within said overflow-pipe, as and for the purpose described.

4. A still for an absorption refrigerating apparatus, said still havingheating-coils with a strong-liquor supply, drip-trays to which saidsupply discharges in the gas-space in the upper part of the still, and apipe to carry the liquor from the lower tray to near the bottom of thestill, the coils and drip-trays being within the distilling-chamber,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

NATHAN W. CONDICT. Witnesses:

F. WARREN WRIGHT, HUBERT HOWSON.

